<!DOCTYPE html>
<html lang="en">
<head>
    <title>three.js webgl - materials</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <link type="text/css" rel="stylesheet" href="css/main.css">
</head>
<body>

<div id="container"></div>
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - Lambert Material Variantions by <a href="http://clara.io/" target="_blank" rel="noopener">Ben Houston</a>.</div>

<script type="module">

    import * as THREE from './build/three.module.js';

    import Stats from './threejs/jsm/libs/stats.module.js';

    import { OrbitControls } from './threejs/jsm/controls/OrbitControls.js';

    import { TTFLoader } from './threejs/jsm/loaders/TTFLoader.js';
    let container, stats;

    let camera, scene, renderer;
    let particleLight;

    const loader = new THREE.FontLoader();
    loader.load( 'threejs/fonts/gentilis_regular.typeface.json', function ( font ) {


    // const loader = new TTFLoader();
    //
    // loader.load( 'threejs/fonts/ttf/SourceHanSerifCN-SemiBold.otf', function ( font ) {


        init( font );
        animate();

    } );

    //
    // loader.load( 'threejs/fonts/33.json', function ( font ) {
    //
    //     init( font );
    //     animate();
    //
    // } );

    function init( font ) {

        container = document.createElement( 'div' );
        document.body.appendChild( container );

        camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 2500 );
        camera.position.set( 0.0, 400, 400 * 3.5 );

        //

        const reflectionCube = new THREE.CubeTextureLoader()
            .setPath( './threejs/textures/cube/SwedishRoyalCastle/' )
            .load( [ 'px.jpg', 'nx.jpg', 'py.jpg', 'ny.jpg', 'pz.jpg', 'nz.jpg' ] );
        reflectionCube.encoding = THREE.sRGBEncoding;

        scene = new THREE.Scene();
        scene.background = reflectionCube;

        // Materials

        let imgTexture = new THREE.TextureLoader().load( "./threejs/textures/planets/moon_1024.jpg" );
        imgTexture.wrapS = imgTexture.wrapT = THREE.RepeatWrapping;
        imgTexture.encoding = THREE.sRGBEncoding;
        imgTexture.anisotropy = 16;
        imgTexture = null;

        const cubeWidth = 400;
        const numberOfSphersPerSide = 5;
        const sphereRadius = ( cubeWidth / numberOfSphersPerSide ) * 0.8 * 0.5;
        const stepSize = 1.0 / numberOfSphersPerSide;

        const geometry = new THREE.SphereBufferGeometry( sphereRadius, 32, 16 );

        for ( let alpha = 0; alpha <= 1.0; alpha += stepSize ) {

            for ( let beta = 0; beta <= 1.0; beta += stepSize ) {

                for ( let gamma = 0; gamma <= 1.0; gamma += stepSize ) {

                    const diffuseColor = new THREE.Color().setHSL( alpha, 0.5, gamma * 0.5 + 0.1 );

                    const material = new THREE.MeshLambertMaterial( {
                        map: imgTexture,
                        color: diffuseColor,
                        reflectivity: beta,
                        envMap: alpha < 0.5 ? reflectionCube : null
                    } );

                    const mesh = new THREE.Mesh( geometry, material );

                    mesh.position.x = alpha * 400 - 200;
                    mesh.position.y = beta * 400 - 200;
                    mesh.position.z = gamma * 400 - 200;

                    scene.add( mesh );

                }

            }

        }

        function addLabel( name, location ) {

            const textGeo = new THREE.TextBufferGeometry( name, {

                font: font,

                size: 20,
                height: 1,
                curveSegments: 1

            } );

            const textMaterial = new THREE.MeshBasicMaterial( { color: 0xffffff } );
            const textMesh = new THREE.Mesh( textGeo, textMaterial );
            textMesh.position.copy( location );
            scene.add( textMesh );

        }

        addLabel( "+hue电饭锅", new THREE.Vector3( - 350, 0, 0 ) );
        addLabel( "-hue", new THREE.Vector3( 350, 0, 0 ) );

        addLabel( "-reflectivity", new THREE.Vector3( 0, - 300, 0 ) );
        addLabel( "+reflectivity", new THREE.Vector3( 0, 300, 0 ) );

        addLabel( "-diffuse", new THREE.Vector3( 0, 0, - 300 ) );
        addLabel( "+diffuse", new THREE.Vector3( 0, 0, 300 ) );

        addLabel( "envMap", new THREE.Vector3( - 350, 300, 0 ) );
        addLabel( "no envMap", new THREE.Vector3( 350, 300, 0 ) );

        particleLight = new THREE.Mesh( new THREE.SphereBufferGeometry( 4, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0xffffff } ) );
        scene.add( particleLight );

        // Lights

        scene.add( new THREE.AmbientLight( 0x222222 ) );

        const directionalLight = new THREE.DirectionalLight( 0xffffff, 1 );
        directionalLight.position.set( 1, 1, 1 ).normalize();
        scene.add( directionalLight );

        const pointLight = new THREE.PointLight( 0xffffff, 2, 800 );
        particleLight.add( pointLight );

        //

        renderer = new THREE.WebGLRenderer( { antialias: true } );
        renderer.setPixelRatio( window.devicePixelRatio );
        renderer.setSize( window.innerWidth, window.innerHeight );
        container.appendChild( renderer.domElement );
        renderer.outputEncoding = THREE.sRGBEncoding;

        //

        stats = new Stats();
        container.appendChild( stats.dom );

        const controls = new OrbitControls( camera, renderer.domElement );
        controls.minDistance = 200;
        controls.maxDistance = 2000;

        window.addEventListener( 'resize', onWindowResize, false );

    }

    function onWindowResize() {

        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();

        renderer.setSize( window.innerWidth, window.innerHeight );

    }

    //

    function animate() {

        requestAnimationFrame( animate );

        render();
        stats.update();

    }

    function render() {

        const timer = Date.now() * 0.00025;

        //camera.position.x = Math.cos( timer ) * 800;
        //camera.position.z = Math.sin( timer ) * 800;

        camera.lookAt( scene.position );

        particleLight.position.x = Math.sin( timer * 7 ) * 300;
        particleLight.position.y = Math.cos( timer * 5 ) * 400;
        particleLight.position.z = Math.cos( timer * 3 ) * 300;

        renderer.render( scene, camera );

    }

</script>

</body>
</html>
